$ ls -l /dev/mapper/

total 0
crw-rw---- 1 root root 10, 60 2009-11-12 08:42 control
lrwxrwxrwx 1 root root      7 2009-11-12 08:42 root -> ../dm-0
lrwxrwxrwx 1 root root      7 2009-11-12 08:42 swap -> ../dm-1
lrwxrwxrwx 1 root root      7 2009-11-12 08:42 temporary-cryptsetup-1243 -> ../dm-1


$ udevadm monitor --env

monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[1258012011.169256] change   /devices/virtual/block/loop0 (block)
UDEV_LOG=0
ACTION=change
DEVPATH=/devices/virtual/block/loop0
SUBSYSTEM=block
DEVNAME=loop0
DEVTYPE=disk
SEQNUM=1275
MAJOR=7
MINOR=0

UDEV  [1258012011.173313] change   /devices/virtual/block/loop0 (block)
UDEV_LOG=0
ACTION=change
DEVPATH=/devices/virtual/block/loop0
SUBSYSTEM=block
DEVNAME=/dev/loop0
DEVTYPE=disk
SEQNUM=1275
ID_FS_UUID=191082b8-cc11-467a-b0c8-41d857240fcc
ID_FS_UUID_ENC=191082b8-cc11-467a-b0c8-41d857240fcc
ID_FS_VERSION=256
ID_FS_TYPE=crypto_LUKS
ID_FS_USAGE=crypto
MAJOR=7
MINOR=0
DEVLINKS=/dev/block/7:0 /dev/disk/by-uuid/191082b8-cc11-467a-b0c8-41d857240fcc

KERNEL[1258012013.256826] add      /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=add
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=dm-2
DEVTYPE=disk
SEQNUM=1276
MAJOR=254
MINOR=2

UDEV  [1258012013.260146] add      /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=add
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=dm-2
DEVTYPE=disk
SEQNUM=1276
DM_SBIN_PATH=/sbin
MAJOR=254
MINOR=2
DEVLINKS=/dev/block/254:2

KERNEL[1258012013.260357] add      /devices/virtual/bdi/254:2 (bdi)
UDEV_LOG=0
ACTION=add
DEVPATH=/devices/virtual/bdi/254:2
SUBSYSTEM=bdi
SEQNUM=1277

UDEV  [1258012013.260818] add      /devices/virtual/bdi/254:2 (bdi)
UDEV_LOG=0
ACTION=add
DEVPATH=/devices/virtual/bdi/254:2
SUBSYSTEM=bdi
SEQNUM=1277

KERNEL[1258012013.261396] change   /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=change
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=dm-2
DEVTYPE=disk
SEQNUM=1278
MAJOR=254
MINOR=2

UDEV  [1258012013.266631] change   /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=change
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=/dev/dm-2
DEVTYPE=disk
SEQNUM=1278
DM_SBIN_PATH=/sbin
DM_NAME=temporary-cryptsetup-1663
MAJOR=254
MINOR=2
DEVLINKS=/dev/mapper/temporary-cryptsetup-1663 /dev/block/254:2
DM_SUSPENDED=0
DM_UDEV_RULES_VSN=1
DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG=1
DM_UDEV_DISABLE_DISK_RULES_FLAG=1
DM_UDEV_DISABLE_OTHER_RULES_FLAG=1

KERNEL[1258012013.270468] change   /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=change
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=dm-2
DEVTYPE=disk
SEQNUM=1279
MAJOR=254
MINOR=2

KERNEL[1258012013.270629] remove   /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=remove
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=dm-2
DEVTYPE=disk
SEQNUM=1280
MAJOR=254
MINOR=2

KERNEL[1258012013.270845] remove   /devices/virtual/bdi/254:2 (bdi)
UDEV_LOG=0
ACTION=remove
DEVPATH=/devices/virtual/bdi/254:2
SUBSYSTEM=bdi
SEQNUM=1281

KERNEL[1258012013.270973] remove   /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=remove
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=dm-2
DEVTYPE=disk
SEQNUM=1282
MAJOR=254
MINOR=2

UDEV  [1258012013.278718] remove   /devices/virtual/bdi/254:2 (bdi)
UDEV_LOG=0
ACTION=remove
DEVPATH=/devices/virtual/bdi/254:2
SUBSYSTEM=bdi
SEQNUM=1281

UDEV  [1258012013.285375] change   /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=change
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=/dev/dm-2
DEVTYPE=disk
SEQNUM=1279
DM_SBIN_PATH=/sbin
DM_UDEV_RULES_VSN=1
MAJOR=254
MINOR=2
DEVLINKS=/dev/disk/by-id/dm-name- /dev/block/254:2

UDEV  [1258012013.291683] remove   /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=remove
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=/dev/dm-2
DEVTYPE=disk
SEQNUM=1280
DM_SBIN_PATH=/sbin
DM_UDEV_RULES_VSN=1
MAJOR=254
MINOR=2
DEVLINKS=/dev/disk/by-id/dm-name- /dev/block/254:2

UDEV  [1258012013.297479] remove   /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=remove
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=/dev/dm-2
DEVTYPE=disk
SEQNUM=1282
DM_SBIN_PATH=/sbin
MAJOR=254
MINOR=2

KERNEL[1258012014.275211] add      /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=add
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=dm-2
DEVTYPE=disk
SEQNUM=1283
MAJOR=254
MINOR=2

KERNEL[1258012014.275857] add      /devices/virtual/bdi/254:2 (bdi)
UDEV_LOG=0
ACTION=add
DEVPATH=/devices/virtual/bdi/254:2
SUBSYSTEM=bdi
SEQNUM=1284

UDEV  [1258012014.275883] add      /devices/virtual/bdi/254:2 (bdi)
UDEV_LOG=0
ACTION=add
DEVPATH=/devices/virtual/bdi/254:2
SUBSYSTEM=bdi
SEQNUM=1284

UDEV  [1258012014.279394] add      /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=add
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=dm-2
DEVTYPE=disk
SEQNUM=1283
DM_SBIN_PATH=/sbin
MAJOR=254
MINOR=2
DEVLINKS=/dev/block/254:2

KERNEL[1258012014.281166] change   /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=change
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=dm-2
DEVTYPE=disk
SEQNUM=1285
MAJOR=254
MINOR=2

UDEV  [1258012014.310787] change   /devices/virtual/block/dm-2 (block)
UDEV_LOG=0
ACTION=change
DEVPATH=/devices/virtual/block/dm-2
SUBSYSTEM=block
DEVNAME=/dev/dm-2
DEVTYPE=disk
SEQNUM=1285
DM_SBIN_PATH=/sbin
DM_NAME=abx
DM_UUID=CRYPT-191082b8-cc11-467a-b0c8-41d857240fcc
DM_SUSPENDED=0
DM_UDEV_RULES_VSN=1
ID_FS_UUID=a2880166-988b-44ef-bfce-eda06f3ad596
ID_FS_UUID_ENC=a2880166-988b-44ef-bfce-eda06f3ad596
ID_FS_TYPE=jfs
ID_FS_USAGE=filesystem
MAJOR=254
MINOR=2
DEVLINKS=/dev/mapper/abx /dev/disk/by-id/dm-name-abx /dev/disk/by-id/dm-uuid-CRYPT-191082b8-cc11-467a-b0c8-41d857240fcc /dev/disk/by-uuid/a2880166-988b-44ef-bfce-eda06f3ad596 /dev/block/254:2


$ ls -l /dev/mapper/ 

total 0
lrwxrwxrwx 1 root root      7 2009-11-12 08:46 abx -> ../dm-2
crw-rw---- 1 root root 10, 60 2009-11-12 08:42 control
lrwxrwxrwx 1 root root      7 2009-11-12 08:42 root -> ../dm-0
lrwxrwxrwx 1 root root      7 2009-11-12 08:42 swap -> ../dm-1
lrwxrwxrwx 1 root root      7 2009-11-12 08:42 temporary-cryptsetup-1243 -> ../dm-1
lrwxrwxrwx 1 root root      7 2009-11-12 08:46 temporary-cryptsetup-1663 -> ../dm-2


$ ls -l /etc/udev/rules.d/

total 24
-rw-r--r-- 1 root root 1071 2008-09-24 16:13 60-pcmcia.rules
-rw-r--r-- 1 root root  462 2009-11-07 00:46 75-cd-aliases-generator.rules.optional
-rw-r--r-- 1 root root 3692 2009-11-07 00:46 75-persistent-net-generator.rules.optional
-rw-r--r-- 1 root root   83 2009-11-08 22:57 90-hal.rules
-rw-r--r-- 1 root root  182 2009-11-03 19:45 97-bluetooth-serial.rules
-rw-r--r-- 1 root root   28 2008-10-19 16:19 99-fuse.rules


$ tail -n 2 /var/log/pacman.log

[2009-11-12 08:22] removed devicekit-disks (009-1)
[2009-11-12 08:22] removed devicekit-power (012-2)